Evacuated students stand in the football field of Seven Lakes High School after they were evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

Evacuated students stand in the football field of Seven Lakes High School after they were evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a ... more

Photo: Cody Duty, Houston Chronicle

Evacuated students stand in the football field of Seven Lakes High... Photo-5718838.77678 - Houston Chronicle

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A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field ... more

A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field ... more

A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field ... more

Students were greeted by parents after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

Students were greeted by parents after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field ... more

Photo: Cody Duty, Houston Chronicle

Students were greeted by parents after they were allowed to leave... Photo-5718832.77678 - Houston Chronicle

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A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

A crowd gathers as Katy ISD Public Information Officer Steve Sanford addresses the media in front of Seven Lakes High School, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field ... more

Students react after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

Students react after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a ... more

Photo: Cody Duty, Houston Chronicle

Students react after they were allowed to leave Seven Lakes High... Photo-5718839.77678 - Houston Chronicle

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A Seven Lakes High School student is questioned in the back of a Katy ISD police car following the report of a 'suspicious device' found on campus. The entire campus was evacuated due to the incident. (Mike Glenn / Houston Chronicle)

A Seven Lakes High School student is questioned in the back of a Katy ISD police car following the report of a 'suspicious device' found on campus. The entire campus was evacuated due to the incident. (Mike

A Seven Lakes High School student is questioned in the back of a... Photo-5719186.77678 - Houston Chronicle

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Seven Lakes High School students were evacuated to the baseball and football fields after a suspicious device was found at the Katy campus.

Seven Lakes High School students were evacuated to the baseball and football fields after a suspicious device was found at the Katy campus.

Photo: Cody Duty, Houston Chronicle

Seven Lakes High School students were evacuated to the baseball... Photo-5718616.77678 - Houston Chronicle

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Students were greeted by parents after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

Students were greeted by parents after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field ... more

Photo: Cody Duty, Houston Chronicle

Students were greeted by parents after they were allowed to leave... Photo-5718841.77678 - Houston Chronicle

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Students were greeted by parents after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., but they had to leave their cars for as the bomb squad did additional searching. less

Students were greeted by parents after they were allowed to leave Seven Lakes High School after the school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field ... more

Photo: Cody Duty, Houston Chronicle

Students were greeted by parents after they were allowed to leave... Photo-5718842.77678 - Houston Chronicle

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A Seven Lakes High School student is questioned in the back of a Katy ISD police car following the report of a 'suspicious device' found on campus. The entire campus was evacuated due to the incident. (Mike Glenn / Houston Chronicle)

A Seven Lakes High School student is questioned in the back of a Katy ISD police car following the report of a 'suspicious device' found on campus. The entire campus was evacuated due to the incident. (Mike

A Seven Lakes High School student is questioned in the back of a... Photo-5719200.77678 - Houston Chronicle

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A police officer directs traffic out front of Seven Lakes Junior High School after the high school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., and parents could pick them up from the junior high, but they had to leave their cars for as the bomb squad did additional searching. less

A police officer directs traffic out front of Seven Lakes Junior High School after the high school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they ... more

Authorities lock down Seven Lakes High School after the high school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. Students were allowed to leave around 1:30 p.m., and parents could pick them up from the junior high, but they had to leave their cars for as the bomb squad did additional searching. less

Authorities lock down Seven Lakes High School after the high school was evacuated, Monday, Jan. 13, 2014, in Katy. Officials evacuated the school to the football field after they found a suspicious package. ... more

Photo: Cody Duty, Houston Chronicle

Authorities lock down Seven Lakes High School after the high school... Photo-5718848.77678 - Houston Chronicle